Tire with radial carcass reinforcement having a tread of thickness E, this tread having a tread surface to come into contact with a roadway and comprising at least one cut opening onto the tread surface to form edge corners, this cut extending into the tread over a total depth H at most equal to the thickness E of the tread, this cut being, between the tread surface and a depth H1 at most equal to the total depth H, in the form of a sipe having a width D suitable for being able to close up at least in part under normal running conditions of the tire. There is also formed, in the vicinity, i.e. at a minimum distance from the said edge corner that is at most equal to five times the width D of the cut, of at least one edge corner of this cut and on the tread surface, at least one cavity having a depth h that is small in comparison with the depth of the cut, i.e. that is at most equal to 30% of the depth H, this at least one cavity reducing the compression rigidity of the tread in the vicinity of the said at least one edge corner.

Blocks are formed on a tread surface of a pneumatic tire by main grooves extending in the tire circumferential direction and lateral grooves which intersect with the main grooves. A size of the block in the tire width direction of the tread surface is set larger than a size of the block in the tire circumferential direction of the tread surface. The blocks include: center blocks which are positioned in a center region in the tire width direction; shoulder blocks which are positioned on both side regions in the tire width direction; and mediate blocks which are positioned in an intermediate region between the center blocks and the shoulder blocks. A recessed portion is formed on an approximately center portions of the shoulder blocks and the mediate blocks excluding the center blocks.

A tire for a motorized two-wheeled vehicle comprising a reinforcing structure of the carcass type, made up of reinforcing elements, anchored on each side of the tire to a bead the base of which is intended to be mounted on a rim seat, each bead being extended radially outward by a sidewall, the sidewalls radially toward the outside joining to a tread. At least the central part of the tread comprises at least one circumferentially continuous cut, the cut being made up, for at least 80% of its length of at least one incision and at most 20% of at least one part having a width greater than that of an incision and the apparent area of the at least one incision is greater than the apparent area of the at least one part having a width greater than that of an incision.

A tire and a tire wear indicating structure thereof are disclosed. The tire wear indicating structure includes an indicator, at least three inclined portions of different heights, and at least two indicating grooves. The indicator has an indicator depth. The inclined portions are adjacently arranged to each other and located in the indicator. The heights of the inclined portions decrease progressively. The indicating grooves are disposed between the adjacent inclined portions. The indicating grooves each have an indicating groove depth that is the main groove depth minus 1.8 to 2.2 mm and is greater than the indicator depth. The current wear condition of the tire can be seen more intuitively, without too much information interfering with the judgment.

Tread for heavy vehicle tire, this tread having a tread surface in the new state, this tread comprising a plurality of cuts opening onto the tread surface in the new state and at least one channel internal to the tread, this channel being intended to form a new groove after the tread has partially worn away, furthermore, each channel is extended radially towards the tread surface by a sipe of the same orientation as said channel and of width L4, and in addition a plurality of sipes of width L3 intersect the sipe extending each channel to form a well, this well opening both onto the tread surface in the new state and into a channel, the tread according to the invention being such that, for at least for a plurality of wells (each well hasin a direction extending from the tread surface towards the channel, at least one maximum-section part and one reduced-section part, the reduced-section part having a cross-sectional area smaller than the cross-sectional area of the maximum-section part so as to limit the ingress of foreign bodies of determined dimensions into this well and, from there, into a channel.

A motorcycle tire comprises a tread portion provided on each side of the tire equator with primary oblique grooves extending from a tread center region to the vicinity of the tread edge, and secondary oblique grooves each having an axially outer end positioned axially inside the axially outer ends of the primary oblique grooves. The secondary oblique grooves comprises a pair of gradually widening parts respectively extending from two extreme ends of the secondary oblique groove in its longitudinal direction toward an intermediate position between the two extreme ends, while gradually increasing the groove width measured perpendicularly to the longitudinal direction, and a pair of gradually narrowing parts which are disposed between the gradually widening parts, and of which groove widths gradually decrease from the gradually widening parts toward the intermediate position.

In a tire, a plurality of outer resonators (25) are formed in an outer land portion (28) partitioned by two outer main grooves (21, 22) and arranged in a tire circumferential direction, a plurality of inner resonators (26) are formed in an inner land portion (29) partitioned by two inner main grooves (23, 24) and arranged in the tire circumferential direction, the outer resonator includes a first vertical groove (31) which extend in the tire circumferential direction, and a first branch groove (32) and a second branch groove (33) which have an inner volume smaller than that of the first vertical groove, extend in the tire width direction from both end portions of the first vertical groove in the tire circumferential direction such that the first branch groove and the second branch groove extend in directions opposite to each other, and are respectively opened to the two outer main grooves, and the inner resonator includes a second vertical groove (36) which extends in the tire circumferential direction, and a third branch groove (37) and a fourth branch groove (38) which have an inner volume smaller than that of the second vertical groove, extend in the tire width direction from the second vertical groove such that the third branch groove and the fourth branch groove extend in directions opposite to each other, and are respectively opened to the two inner main grooves.

A motorcycle tire improved in transient characteristics when leaned is disclosed, wherein the tread portion has a unidirectional tread pattern comprising: inside oblique main grooves disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the intended rotational direction (R) at an angle of 5 to 30 degrees with respect to the circumferential direction, and each having an inner end (Ai) at a distance of 0 to 30% of the half tread width (W) from the tire equator; and outside oblique main grooves 11 disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the counter-rotational direction at an angle of 10 to 60 degrees with respect to the circumferential direction, and each having an inner end (Bi) axially inside the outer end (Ao).

A pneumatic tire comprises shoulder land zones and middle land zones divided by shoulder main grooves and a crown main groove. The shoulder land zone is divided by shoulder lateral grooves into shoulder blocks. The middle land zone is formed as a circumferential rib in substance. The middle land zone is provided with first and second middle outward slots which extend from the shoulder main groove toward the axially inside beyond the widthwise center line of the middle land zone, while gradually decreasing the width and inclining with respect to the tire axial direction at an angle 1 and an angle 2 (2>1), respectively, and terminate within the middle land zone. The open ends of the first and second middle outward slots respectively face the open ends of the shoulder lateral grooves at the shoulder main groove.

Provided is a pneumatic tire used with a specified rotation direction, including a tread, a pair of sidewalls extending continuously from the tread inward in a tire radial direction, a pair of beads continuous with the sidewalls inward in the tire radial direction, and at least one ridge on a buttress surface. The buttress surface extends from a tread edge of a tread surface formed on the tread to the sidewall. The ridge extends from a sidewall side of the buttress surface towards the tread edge and terminates before reaching the tread edge. The ridge includes a steeply inclined surface, having a high gradient with respect to the buttress surface, inclined forwards in the rotation direction, and a moderately inclined surface, having a more moderate gradient than the steeply inclined surface, inclined backwards in the rotation direction.